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<div dir="ltr">Hello Martin (or anyone who has used optim_m1qn3 on ARCHER)
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<div>I have used optim_m1qn3 previously but not on the ARCHER UK supercomputer (a Cray architecture). The setup i am using (making use of STREAMICE/OpenAD/optim_m1qn3) has been working well on the MIT engaging cluster but am now trying to run on ARCHER. Following
the recommendations of others I have built MITgcm using Cray compilers; and i modified mlosch/m1qn3_optim/Makefile, save to point to my build directory.</div>
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<div>The first call to optim.x yields the error</div>
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<div> OPTIM_READDATA: opened file ecco_cost_MIT_CE_000.opt0000 </div>
<div>At line 1295 of file optim_readdata.f (unit = 20, file = 'ecco_cost_MIT_CE_000.opt0000')</div>
<div>Fortran runtime error: End of file</div>
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<div>which suggests the binary file is written in a format that optim_m1qn3 is not expecting? </div>
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<div>Other tests I did:</div>
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<div>1) Ran the same experiment (i.e. same code and input, but with gnu compilers) on the engaging cluster. Ran fine.</div>
<div>2) Called optim.x (compiled on Archer) with the ecco_cost_MIT_CE_000.opt0000 produced on engaging. Ran fine.</div>
<div>3) Called optim.x (compiled on engaging) with the ecco_cost_MIT_CE_000.opt0000 produced on ARCHER. </div>
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<div>Hence, either mitgcmuv_ad is writing a corrupted executable when built with a cray compiler, or the Makefile of m1qn3_optim should be modified to reflect that its input files are being produced by a cray-compiled executable -- but I do not know how to
do this. I am attempting now to build and run MITgcm/OAD using iFort, but may run into trouble for different reasons.</div>
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<div>Any guidance you could give on this topic would be much appreciated.</div>
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<div>Best</div>
<div>Dan</div>
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<div dir="ltr"><br style="font-size:12.8px">
<span style="font-size:12.8px">Daniel Goldberg, PhD</span><br style="font-size:12.8px">
<span style="font-size:12.8px">Sr. Lecturer in Glaciology</span>
<div style="font-size:12.8px">School of Geosciences, University of Edinburgh<br>
<span style="color:rgb(0,0,0);font-family:arial,helvetica,clean,sans-serif;line-height:15px">Geography Building, Drummond Street, Edinburgh EH8 9XP</span><br>
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em: <a href="mailto:dan.goldberg@ed.ac.uk" target="_blank">dan.goldberg@ed.ac.uk</a><br>
web: <a href="https://www.geos.ed.ac.uk/homes/dgoldber" target="_blank">https://www.geos.ed.ac.uk/homes/dgoldber</a></div>
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The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.
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